Admiral of the Fleet Sir David Benjamin Bathurst, is a former Royal Navy officer. He is the only living person, apart from King Charles III, holding the rank of Admiral of the Fleet in the Royal Navy since the death of Lord Boyce. After training as a pilot and qualifying as a helicopter instructor, Bathurst commanded a Naval Air Squadron and then two frigates before achieving higher command in the navy. He served as First Sea Lord and Chief of the Naval Staff from 1993 to 1995: in that capacity he advised the British Government on the deployment of Naval Support including Sea Harriers during the Bosnian War.

Admiral of the Fleet is a five-star naval officer rank and the highest rank of the Royal Navy, formally established in 1688. The five-star NATO rank code is OF-10, equivalent to a field marshal in the British Army or a Marshal of the Royal Air Force. Apart from honorary appointments, no new admirals of the fleet have been named since 1995, and no honorary appointments have been made since 2014.